OL Nippon has my unreserved recommendation, as a Jdrama. It has that special magic some Jdrama tend to possess despite the cliched storylines, and the ending kind of reminded me of Cat Street - people grow apart, "grow up", and maybe meet again. I especially like how Kanzaki-san made the decision for herself and kept true to herself towards the end. And even the smallest or most unlikable characters are given a chance to shine. Perhaps this can only happen in a Jdrama/animu/manga, because I haven't seen this anywhere else (on television, anyways).